Answer:
50 units²
Explanation:
The area of a trapezoid can be found using the following formula.

The height of the trapezoid is 5 units. The bases are 8 units and 12 units.

Substitute the values into the formula.

Solve inside the parentheses. Add 8 and 12.
8+12=20

Multiply 5 and 20.
5*20= 100

Multiply 1/2 and 100 or divide 100 by 2.
100 * 1/2= 50 or 100/2= 50

Add appropriate units. For this problem, the units are units².

The area of the trapezoid is 50 square units.